Computer marker



FIG. 1 is a front, top perspective view of a computer marker;

FIG. 2 is a rear, top perspective view thereof;

FIG. 3 is a bottom perspective view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a side view thereof as seen from the left-hand side of FIG. 4.

The broken lines shown are included for the purpose of illustrating unclaimed portions and form no part of the claimed design. 

The ornamental design for a computer marker, as shown and described. 